Burners



' Feb} 1,969 a. M. BITTERLICH 2 I BURNERS Sheet Filed Sept 18, 1967 9 83 3 2 2 4 I 8 39 a 7 4/ 8 47 a 5 lwh 3 W 5 HH w M fl INVENTOR GORDON H.B/TTERL/CH Feb. 4, 1969 B|TTERL|CH 3,425,781

summns Filed Sept. 18, 1967 Sheet 3 M4 INVENTOR GORDON M. BITTERL/CHATTORNEY Feb. 4, 1969 Filed Sept. 18, 1967 G. M. BITTERLICH BURNERSSheet 4 014 FIG. 5 4

IN VE N TOR GORDON M. 8/ TTERL/CH ATTORNEY United States Patent ClaimsABSTRACT OF THE DISCLOSURE Heating apparatus for furnace wallscomprising a gas burner in a well outside a burner block in a furnacewall and along a wall to be heated, the gas burner having a plurality ofspaced gas delivery ports, and the burner block having an inclined slotfor each gas delivery port. The well has a register in one wall thereoffor regulating the induction of air for combustion. The burner block mayoptionally have an oil burner removably mounted with respect to a commonpassageway in the burner block with which the slots are also incommunication.

BACKGROUND OF THE INVENTION Field of the invention This inventionrelates to heaters and more particularly to heaters for furnace wallswhich are to supply radiant heat for petroleum refinery processes andthe like.

Description of the prior art It has heretofore been proposed to providecenter and single wall up-draft heaters. In the US. Patent No. 2,659,424to William Ferguson, there is shown combustion apparatus for suchheaters. A gas burner unit, as there shown in which the gas and air aremixed before delivery through the burner imposes limitations on thetotal fuel input at each burner.

The heaters heretofore available did not provide uniform heating of thewall this being readily observable in the vari-colored appearance of thewall in use.

It has also heretofore been proposed to provide selectively or tandemfired oil and gas burners lbut the available structures involvecomplexities in the burner blocks or have other shortcomings.

SUMMARY OF THE INVENTION It is the principal object of the presentinvention to provide burners for heating furnace walls which permit ofhigh combustible input and proper control of air supplied for combustionof the fuel, while maintaining unifor'mity of heating of the wall fromend to end.

It is a further object of the present invention to provide burners forheating furnace walls in which an improved relation between the burnersand burner block is established to attain uniformity of heating of thewall.

It is a further object of the present invention to provide burners forheating furnace walls in which a gas burner with spaced gas deliveryopenings therealong is disposed in a well beneath a passageway in aburner block in the floor and in the wall, the well having an airregister for controlling the air induced for combustion of the gas, andthe gas burner being offset beneath the wall to be heated.

It is a further object of the present invention to provide burners ofthe character aforesaid in which an oil burner is optionally providedfor selective or tandem operation for the oil burner being in directcommunication with the burner block passageway.

It is a further object of the present invention to provide burners forheating furnace walls, one burner being gas fired and the other beingoil fired, the burners being capable of selective operation or operationin tandem, and the [burners being separately removable for inspectionand cleaning so that operation may be continued with the remainingburner.

Other objects and advantageous features of the invention will beapparent from the description and claims.

BRIEF DESCRIPTION OF THE DRAWINGS The nature and characteristic featuresof the invention will be more readily understood from the followingdescription taken in connection with the accompanying drawings formingpart thereof, in which:

FIG. 1 is a vertical sectional view of one unit of a wall heating burnerin accordance with the invention;

FIG. 2 is a vertical sectional view taken approximately on the line 22of FIGURE 1;

FIG. 3 is a horizontal sectional view taken approximately on the line3--3 of FIGURE 1;

FIG. 4 is a vertical sectional view of another unit of a wall heatingburner in accordance with the invention having an oil burner associatedwith a. gas burner;

FIG. 5 is a vertical sectional view taken along the line 5-5 of FIG. 4;and

FIG. 6 is a fragmentary sectional view of the base of the oil burner.

It should, of course, be understood that the description and drawingsherein are illustrative merely, and that various modifications andchanges can be made in the structure disclosed without departing fromthe spirit of the invention.

Like numerals refer to like parts throughout the several vlews.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now more particularlyto FIGS. 1 to 3 of the drawings, a fragmentary portion of a furnace isillustrated which includes a bottom wall or floor 10, which preferablyincludes a metallic floor plate 11 and ceramic refractory lining 12, anda vertical wall 14, of ceramic refractory material, which may be theside or rear wall or the center wall of an up-draft heater or furnace ofconventional type, or which may be a horizontal Wall.

At spaced locations along the wall 14, a burner block assembly 15 isprovided which includes a front block 16, a rear block 17 and end blocks18 carried on the floor plate 11. The front block 16 has an innerupwardly and forwardly inclined face 19.

The rear block 17 is preferably inserted in an opening 20 beneath thewall 14. The upper face 21 of the opening 20 may be level with the upperface 22 of the lining 12. The rear block 17 has a vertical face 23 whichis preferably aligned with the vertical face 24 of the wall 14 and at aplurality of locations therealong corresponding to burner tips, ashereinafter pointed out, has spaced slots 25 with substantially parallelside faces 26, a rear inclined face 27 and an upper inclined face 28 ina plane which, if extended, would intersect the face 119 about one thirdof the distance down from the top thereof. In a specific embodiment thewidth between the side faces 26 Will be about one inch, the maximumdepth about one inch and the height about two inches.

The end blocks 18 have inner outwardly inclined faces 29. A passageway52 is provided in the burner block assembly bounded by the faces 19, 23and 29 and with which the slots 25 are in communication and in whichcombustion can occur as pointed out below.

Beneath the burner block assembly 15, and at an opening 31 in the bottomwall 10 below the passageway 52, an air register 30 provides a well. Theregister 30 has end walls 32, a front wall 33 and a rear wall 34connected to 3 the end walls 32 and secured by studs 35 to the floorplate 11, and a bottom wall 36 connected to the end walls 32, the frontwall 33 and the rear wall 34, The wall 36 has a plurality of spaced airinlet openings 37 and is detachably connected to the front and rearwalls 33 and 34 by studs 38.

Slidably mounted on the bottom wall 36, a shutter plate 40 is provided,held by edge brackets 41 and by cross brackets 42. One of the crossbrackets 42 is preferably provided with a locking screw 43 which isadapted to engage the shutter plate 40 and hold it in a selectedposition of adjustment.

The shutter plate 40 has a plurality of spaced air inlet openings 44movable with respect to the openings 37 from closed to open position,thereby to determine the admission of air manually operable positioninghandle 45 extends downwardly from the shutter plate 40.

A main fuel gas supply pipe 46 is provided which extends through thebottom wall 36 offset from the shutter plate 40.

A pilot gas-air pipe 47 also extends through the bottom wall 36 and aslot 48 connecting two central air inlet openings 44 permits slidingmovement of the shutter plate 40 and the edges 49 of those openingsprovide limit stops by engaging the pipe 47.

The gas-air pipe 47 can have a venturi 50 for air mixing and a fuel gassupply pipe 51 extending into the venturi 50.

The fuel gas supply pipe 46 has a horizontally disposed longitudinallyextending manifold 55 carried thereon with spaced nozzles or burner tips56, which may be of any desired type each with a gas delivery port. Themanifold 55 is below the rear block 17 and the openings of the nozzlesor burner tips 56 are inset with respect to the face 23 and also withrespect to the face 24 (see FIG. 1).

The nozzles or burner tips 56 are each centrally located along themanifold 55 with respect to the slots 25 (see FIG. 2).

The mode of operation will now be pointed out.

A flame from the combustion of gas delivered through the pipe 51 withair admixed in the venturi 50 is available The flame attendant upon theburning of gas from the nozzles or burner tips 56 in confined within thespace or passageway 52 and extends from just above the upper ends of theslots 25 beyond the passageway 52 and upwardly along the face 24. Theheat from that flame, as well as that transferred directly to the wall14 from the burner block 17 and the rear ends of the burner blocks 18beneath the wall 14 is effective for heating the wall 14. The movementof the flame upwardly along the wall 14 has a scrubbing action due tothe Coanda effect.

The slots 25 are effective for directing the gas and air for combustionagainst the face 19 with reflection therefrom toward the upper part ofthe block 17 and the lower part of the wall 14.

It has been found in practice that substantially uniform heating of thewall 14 is effected and that this occurs upwardly in the wall 14 for asubstantial distance.

Referring now more particularly to FIGS. 4, 5 and 6, in place of theregister 30, a register 130 is provided having end walls 132, a frontwall 133 and a rear wall 134 connected to the end walls 132 and securedby studs 35 to the floor plate 11, and a bottom wall 136 connected tothe end walls 132, the front wall 133 and the rear wall 134. The rearwall 134 has a damper plate 60 carried by hinges 61 on the rear wall134, with a quadrant 62 of well known type at each end permitting ofadjustment to the desired extent of opening for air inlet control.

The main fuel gas supply pipe 146 extends through an opening 63 in thedamper plate 60 and has a quick detach-able connection 64 interposedthereon so that the manifold 55 may be disconnected, and withdrawn forservicing. The positioning of the manifold 55 may require connectorpipes 65 between the manifold 55 and the burner tips 56 to properlylocate the burner tips 56 with respect to the slots 25.

The bottom wall 136 has an opening 67 through which an oil burnerassembly 68 can be inserted. The assembly 68 is detachably connected toa manifold 70 and held in assembled relation by a pivoted yoke 71 whichcarries a clamping screw 72.

The manifold 70 has an oil supply pipe 74 and a steam supply pipe 75connected thereto. The manifold 70 has an oil passageway 76 therein fordetachable connection to an oil passageway 77 in the burner assembly 68.The passageway 77 extends to the oil burner nozzle 78 for delivery ofoil thereto.

The manifold 70 also has a steam passageway 79 therein for detachableconnection to a steam passageway 80 in the burner assembly 68. Thepassageway 80 extends to the oil burner nozzle 78 for supplying steam toatomize the oil in a well known manner.

It will be noted that the oil burner nozzle 78 is centrally located atthe inlet of the passageway 52 for delivery of atomized oil thereinto,preferably in a flat diverging or fan pattern.

The mode of operation will now be pointed out.

If gas is to be burned it is sup-plied to the manifold 55 and dischargedthrough the burner tip 56 as previously explained.

If oil is to be burned it is supplied through the oil supply pipe 74 andthrough the passageways 76 and 77 to the oil burner nozzle 78. Steam,supplied through the pipe 75 and passageways 79 and 80, is employed toatomize the oil, and discharge it preferably in a flat diverging patterninto the passageway 52 for combustion. The combustion will be initiatedwithin the passageway 52 a short distance from the oil burner nozzle 78and will continue within the passageway 52 beyond the block 17 andupwardly along the face 24 of the wall 14.

Air for combustion is supplied through the register 130, the inductionbeing controlled by the positioning of the damper plate 60.

If only a limited supply of combustible gas is available at a particulartime, or if maximum heating effect is desired both gas and oil may besupplied for combined or tandem operation.

The combustion of the respective fuels will be initiated as previouslyexplained in the passageway 52 and continue therebeyond as previouslyexplained.

The burner constructions heretofore described can, of course, beemployed in multiples, dependent upon the horizontal dimensions of thewall 14.

Either the gas manifold 55 and burner tips 56, or the oil burnerassembly 68 may be disconnected and removed for servicing, if desired,with the remaining burner being available for continued operation.

I claim:

1. Combustion apparatus for a furnace having a first wall in meetingrelation to a second wall to be heated which second wall has an exposedface comprising a burner block assembly in said first wall,

said burner block assembly having a first block portion in said secondwall with an outer face aligned with the face of the second wall,

said burner block assembly having a second block portion in said firstwall in spaced parallel relation to said first block portion,

said block portions having an interior passageway there between,

a gas manifold in parallel relation to said first and second bloc-kportions,

a combustible gas delivery pipe connected to said manifold for thesupply of gas thereto,

said manifold having a plurality of spaced gas delivery 6. Combustionapparatus as defined in claim 5 in which said floor has an upper face,and

said first block portion is beneath said second wall.

7. Combustion apparatus as defined in claim 6 in which said gas deliveryopenings are below said first block,

ports located outwardly of said first block portion 5 and anddischarging gas into said passageway, and said first block portion has aslot above each of said a Well member in enclosing relation to saidmanifold, gas delivery openings. said well member having portions forthe supplying 8. Combustion apparatus as defined in claim 7 in which ofair into the interior of said Well member. each of said slots has anupper inclined face in a plane 2. Combustion apparatus as defined inclaim 1 in which 10 in intersecting relation to said second blockportion said first block has a slot in said outer face interiorly belowthe top thereof.

of each of said gas delivery ports. 9. Combustion apparatus as definedin claim 1 in which 3. Combustion apparatus as defined in claim 1 inwhich an atomizing oil burner nozzle is provided in said well said firstblock portion has a slot in said outer face inmember, and dischargingatomized oil into said pasteriorly each of said gas deli-very ports, andsageway, and each of said slots has an angularly disposed face in an oilsupply pipe is provided connected to said nozzle. a plane inintersecting relation to said second block 10. Combustion apparatus asdefined in claim 9 in portion. which 4. Combustion apparatus as definedin claim 1 in which said oil supply pipe and said gas delivery pipe havesaid Well member includes an air register, and

said register has a movable portion for regulating the combustion airdelivery thereinto and to and beyond said manifold into said passageway.

5. Combustion apparatus as defined in claim 1 in which detachableconnections therein.

References Cited UNITED STATES PATENTS 0 said first l\lvall 1s a floorand said second Wall is a verti- 22283 ca Wa 3,101,769 8/1963 Zink etal. 431- said exposed face of said second Wall is vertically disposed,and

FREDERICK L. MATTESO N, JR., Primary Examiner.

said manlmd is hmimmany disposed" EDWARD G. FAVORS, Assistant Examiner.

